allow fetching of export zips

services/web/app/coffee/Features/Exports/ExportsController.coffee

@@ -37,3 +37,10 @@ module.exports =
 				status_detail: parsed_export.status_detail
 			}
 			res.send export_json: json
+
+	exportZip: (req, res) ->
+		{export_id} = req.params
+		ExportsHandler.fetchZip export_id, (err, export_zip_url) ->
+			return err if err?
+
+			res.redirect export_zip_url

services/web/app/coffee/Features/Exports/ExportsHandler.coffee

@@ -115,3 +115,19 @@ module.exports = ExportsHandler = self =
 				err = new Error("v1 export returned a failure status code: #{res.statusCode}")
 				logger.err err:err, export:export_id, "v1 export returned failure status code: #{res.statusCode}"
 				callback err
+
+	fetchZip: (export_id, callback=(err, zip_url) ->) ->
+		console.log("#{settings.apis.v1.url}/api/v1/sharelatex/exports/#{export_id}/zip_url")
+		request.get {
+			url: "#{settings.apis.v1.url}/api/v1/sharelatex/exports/#{export_id}/zip_url"
+			auth: {user: settings.apis.v1.user, pass: settings.apis.v1.pass }
+		}, (err, res, body) ->
+			if err?
+				logger.err err:err, export:export_id, "error making request to v1 export"
+				callback err
+			else if 200 <= res.statusCode < 300
+				callback null, body
+			else
+				err = new Error("v1 export returned a failure status code: #{res.statusCode}")
+				logger.err err:err, export:export_id, "v1 export zip fetch returned failure status code: #{res.statusCode}"
+				callback err

services/web/app/coffee/router.coffee

@@ -245,6 +245,7 @@ module.exports = class Router
 
 		webRouter.post '/project/:project_id/export/:brand_variation_id', AuthorizationMiddlewear.ensureUserCanAdminProject, ExportsController.exportProject
 		webRouter.get '/project/:project_id/export/:export_id', AuthorizationMiddlewear.ensureUserCanAdminProject, ExportsController.exportStatus
+		webRouter.get '/project/:project_id/export/:export_id/zip', AuthorizationMiddlewear.ensureUserCanAdminProject, ExportsController.exportZip
 
 		webRouter.get  '/Project/:Project_id/download/zip', AuthorizationMiddlewear.ensureUserCanReadProject, ProjectDownloadsController.downloadProject
 		webRouter.get  '/project/download/zip', AuthorizationMiddlewear.ensureUserCanReadMultipleProjects, ProjectDownloadsController.downloadMultipleProjects